Cranial repair is a relatively routine procedure in neurosurgery, and it is a surgical procedure to repair cranial defects caused by various reasons (cranial trauma, craniotomy, etc.). For patients with cranial defects, timely cranial repair surgery is necessary to restore a stable and closed intracranial environment and increase the strong protection of intracranial soft tissues. Cranial repair is actually a medical technique with a very long history, as our ancestors were practicing such medicine thousands of years ago. After thousands of years of long development, the technique of cranial repair surgery has become quite mature to this day. One of the major factors limiting the effectiveness of repair is the choice of cranial repair materials. Although it is common to use titanium alloy material for skull repair surgery in clinical practice, is titanium alloy good quality for skull repair surgery? I am afraid this is a question mark! We have seen many cases of various problems after using titanium mesh for cranial repair, and there are even cases of death caused by this, which is distressing. For example, some will have post-operative infection, some will have post-operative rejection, and even lead to the destruction of scalp tissue and the exposure of titanium mesh material; in addition, titanium mesh is not insulated, and a slight change in the cold outside may lead to discomfort; titanium mesh overlay repair will also produce cutting damage to the scalp, and post-operative CT and MRI examinations will also have metal artifacts that interfere with the diagnosis So titanium alloy is not the best choice for cranial repair material Therefore, titanium is not the best material for skull repair. There is a newest polyetheretherketone material (also commonly known as PEEK material), which can be used for cranial bone repair with excellent clinical results. This material completely overcomes the above-mentioned disadvantages of titanium mesh and can achieve ideal repair results, and has now become the new favorite material for cranial bone repair.